Concrete-form.



G. F. WALLER. CONCRETE FORM.

Patented July 23, 1918.

U TED STATES PATENT OFFICE.

GUSTAVE F. WALLER, OF REDWOOD CITY, CALIFORNIA.

CONCRETE-FORM.

Application tiled May 20, 1918.

To all whom it may concern:

Be it known that I, GUs'rAvn F. WALLER, a citizen of the United States, residing at Redwood City, in the county of San Mateo and State of California, have invented new and useful Improvements in Concrete- Forms, of which the following is a specification.

The object of the present invention is to provide improvements in forms for concrete walls, partitions, sides of ships, and the like.

At present there are used for making such forms boards, which are nailed or otherwise secured to posts, to sustain them in their proper positions. In the use of these boards there is great waste of material, as in removing them from the concrete walls said boards are frequently rendered worthless for subsequent use for the same purpose.

It is the object of the present invention to provide simple means whereby this waste can be avoided.

In the accompanying drawing, Figure 1 is a top plan view of a plate in its position constituting one side of a form for a concrete wall, the posts for supporting said form being shown in horizontal section; Fig. 2 is a broken side view of said plate and posts; Fig. 3 is a cross-sectional view on the line 33 of Fig. 1; Fig. 4 is a perspective of a metal plate used as a side.

Referring to the drawing, 1 indicates uprights for supporting one side of a concrete form, and 2 indicates a metal plate constituting said side. To said plate are secured by screws 3 ends of arched supports 4 arranged in line at suitable intervals, mediate portions of which are secured by screws 6 to the inner sides of a guide 7. Said guide is provided with two parallely extending undercut grooves 8, and in said grooves can slide bars or holders 9 of the same cross-section as the grooves, here shown as rectangular. One end of each bar is pointed, as shown at 11, the pointed ends of the two bars extending in opposite directions. Near the other end of each bar extends therefrom through the narrow outer portion of the grooves a neck 12 having outside the groove a head 13.

The plate 2 is preferably formed at the center of its upper edge with an extension 14 extending from said edge first at right angles to the plane of said plate and then upwardly parallel with said plane, so that the inner surface of the upper portion of said extension is in the same plane as the Specification of Letters Patent.

Patented July 23, 1918.

Serial No. 235,622.

outer surface of the plate. The lower edge of the plate immediately above it can, therefore, when resting upon the upper edge of said lower plate, be firmly held in position by said extension. Each plate is also preferably cut away, as shown at 16, in its upper corners to permit tie wires to pass therethrough.

The following is the manner of use of the concrete form: The posts 1 being in position, the plate 2 is held in a position in which its terminal portions are in contact with the inner sides of the posts and while in this position the heads 13 are struck by a hammer in such directions that the pointed ends of the bars project beyond the respect1ve grooves and enter the sides of the adjacent posts. The plate is thus securely held upon the posts in the proper position to make one side of the concrete form. When a series of pairs of plates have thus been placed in position the concrete can be poured therebetween. After the concrete is hardened the heads are struck by a hammer in the reverse direction to the former, by which the pointed ends of the bars are withdrawn from the posts. The plates can then be removed from the concrete and can be used over again in like manner to form another part of the concrete structure.

I claim:

1. In means for forming a concrete wall, a plate, the terminal portions of which are adapted to contact with sides of posts, bars guided by each having a pointed terminal portion, the terminal portions of the two bars being oppositely directed, means for moving one of said bars lon itudinally relatively to the other, means or guiding said bar in its movement, and means for supporting the plate relatively to the guide.

2. In means for forming a concrete wall, a plate, the terminal portions of which are adapted to contact with sides of posts, a guide extending parallel with the plate, means for supporting the plate relatively to the guide, bars guided by said guide and having each a pointed terminal portion, the terminal portions of the two bars being oppositely directed, and means for moving one of said bars longitudinally relatively to the other.

3. In means for forming a concrete wall, a plate, the terminal portions of which are adapted to contact with sides of posts, a guide extending parallel with the plate,

oppositely directed, and means for'moving said bars in'oppositedireetions insaid guide.

' "tfiln lneansfofforniing a concrete wall, a

plate terminal portions ofz-which; arerwad'ap'te ed to contact with sides of posts, a guide extei iding Y substanti ally 5 parallel with the plate between the posts; means: for supporting the platefrelatively'to:the guideholders guided 4 by said guide'and eaeh fhaving'a rpeinted terminal portion,- theterminal portions of the two holdersabeingoppositely: directed;

5. In means for forming a concrete wall, a plate, terminal portlons of whlch are -ada'pte'dto c'ontaetwithsides of posts, a guide extending substantially parallel with the plate between the posts, means for supporting the plate relatively touthe giuide,

holders guided by said guide and ea'chhav- ;ing "a pointed terminal portion, the terminal portions of the two holders being oppositely directed, saidheldersiheingiprovided with liead'sl located; outsidertlie guide and of suitable? fernr to receive'. the impacts of blows ofaa Jlaannn er rforrinovingi said helders in said guide. v V 7 r GUSTAXEEAF WAILLER Copies of this patent mafy be attained forfiyeecents ea chgb y addressing the commissioner of Bahama .t !;Wgig1iingtoxzjkflf? I l Wang- 

